In Exercises, both first partial derivatives of the function f (x, y) are zero at the given
Question:
In Exercises, both first partial derivatives of the function f (x, y) are zero at the given points. Use the second-derivative test to determine the nature of f (x, y) at each of these points. If the second-derivative test is inconclusive, so state.
f (x, y) = 6xy2 - 2x3 - 3y4; (0, 0), (1, 1), (1, -1)
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fx y 6xy 2x3 34 af a2f 2 af 6y 6x 12xy12y a2f 12r 12x36y 1...View the full answer
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Related Book For
Calculus And Its Applications
ISBN: 9780134437774
14th Edition
Authors: Larry Goldstein, David Lay, David Schneider, Nakhle Asmar
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